var createError = require("http-errors");
var express = require("express");
var path = require("path");
var cookieParser = require("cookie-parser");
var logger = require("morgan");

var usersRouter = require("./routes/users");
var housesRouter = require("./routes/houses");
var findRoomsRouter = require("./routes/findRooms");
var detailsRouter = require("./routes/details");
var trafficsRouter = require("./routes/traffics");

const cors = require("cors");

var app = express();

var mongoose = require("mongoose");
mongoose.connect("mongodb://localhost:27017/baletu", {
  useNewUrlParser: true,
  useUnifiedTopology: true,
});

// 查看数据库是否连接成功以及输出对应成功和失败的原因
var db = mongoose.connection;
db.on("error", console.error.bind(console, "connection error:"));
db.once("open", function () {
  console.log("数据库连接成功");
});

// view engine setup
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");

app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));

app.use(cors());

app.use("/api/users", usersRouter);
app.use("/api/houses", housesRouter);
app.use("/api/findRooms", findRoomsRouter);
app.use("/api/details", detailsRouter);
app.use("/api/traffics", trafficsRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get("env") === "development" ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render("error");
});

module.exports = app;
